[Avodah] Minhag Yerushalayim - candle lighting 40 minutes before sunset

[Danny Schoemann]

> I have been looking for the source to the Minhag Yerushalayim of
> lighting Shabbos candles 40 minutes before sunset.

> Does anyone know the source why 40 minutes?

IIRC it has something to do with putting various Chumros together.
Here are some pointers:

See MB 261:2 in the Bi'ur Halocho "Mitchilas Hashki'a" towards the end
- (in my version, 6 lines from the end of page 33) - that Rabbeinu
Eliezer MiMetz (d. 1175) ; the author of Sefer HaYerei'im holds that
Shki'a starts 3/4 mil. before sunset.

 See Sha'ar Hatzi'un (21) on the next page that the Yerei'im holds
that a mil is 24 minutes.

Add to that the Mechaber who suggests/allows up to 3/4 mil for Tosefes
Shabbos and you have 36 minutes.

The MB himself suggest half an hour for Tosefes Shabbos in 261:2:(23)

- Danny